Circulating pump



Sept. l5, 1925'. 1,553,681.v

K. FREITAG GIRCULATING PUMP Filed Nov. 7'. 1923 5y 'K Fre/'fag Trae/yf Ys.

Famed is, ma

PATENT OFFICE.

mn ruine, or OAKLAND, lcan'nfcaisua.

s emcumme ruin.

application mea november '7, ma 'serial iro. svsss.

To all whom it may concern:

Be it known that I, KNUD FREITAG, a citizen of the United States, and a residentl of Oakland, c ounty of Alameda, and State of California, liaveinvented a 'certain new and useful Circulating Pump, of which. the following is a specification.

The invention relates to a circulating ump for circulating the water in the cooling system of an internal combustion engine and particularly to the means for driving said pump. A

An' objectof the invention is to provide a pump for circulating the water in the cooling system of an automobile engine,

with a lubricating system which will maintain the pump drive properly lubricated.

Another ob]e'ct of the invention is to provide a circulating pump particularly adapted for use on Ford automobiles and in which a number of Ford parts are used, thereby decreasing the cost of installation of the pump.

Another object of the invention is to prof vide a combined pump and fan drive with means for keeping the drive properly lubricated.

Anotherobject of the invention is to provide means for adjusting the position of the driving pulley so that the driving belt may be maintained taut.

The invention possesses other advantageous features, some ofwhich with the foregoing will be set forth atlength in the fol, lowing description, where I shall outline in full that form of my invention which I have.

selected for illustration in the drawing accompanying and forming part of the present specification. In'said drawing I have shown one type of circulatingpump embodying my invention, but it is to be understood that I do not limit myself to the forni shown in the drawing, since the invention, as set forth in the claims, may be embodied in a plurality of forms.

The drawing is a vertical section through the pump showing the driving and lubricating means. l

Ford automobiles are not regularly -equipped with pumpsain the cooling system of the engine and in many instances it is desirable to install pumps "in such systems to positively circulate the water through the systems. The pump of my invention is adapted to be secured to the front of the engine block to receive water therefrom and delbiver it to the radiator. The pump is driven by the fan belt with which the automobile is regularly equipped and the fan is attached to the pump drive so that the 'fan pulley serves to drive b'oth the pump and the; fan, v The constructionV of the pump of my invention is such that many .of the parts with which the'automobile is regularly equpped may be used in the combined ump 'an an drive, so that when the pump is installed, it is not necessary to discard these parts, thereby reducing the cost of equipping an automobile with the pump of my invention. v v

'lhe pump comprises a casing 2 which is divided into an inlet passage 3 and an out-- let passage 4 by the vertically disposed wall 5 which terminates above the lower end of the casing, thus providing a pump chamber f3 at the lower end of the casing.. The casing 4is provided on its inlet side with a flange 7 which is bolted to the front of the engine block with the inlet opening 8 of the pump in registry with the ,outlet opening of the circulating system in the engine block 9. At its upper end the casing is provided with a neck 12 which is connected to the upper portion of the radiator by a hose. -The dividing wall 5 preferably extends upward to the end of the neck .thereby pro-l viding a passage 13 connecting the inlet chamber 3 with the hose, so that when the ump is not4 in operation, any steam formed in the engine block may discharge directly into the radiator without displacing the liquid contained in the basin The casing is provided in its front wel?, adjacent 'the lower end thereof, with a circular opening which is closed by the circular cover plate 14, any suitable means being employed for holding this plate in tight engagement with the casing. A gasket 15 interposed between the plates and the casing prevents the leakage of water at this point. Mounted eccentrically' in the. cover late 14 is a 'stud bearing 16 which exten s forwardlyfrom the casing. The stud bearing is tightly fixed to the cover plate 14 so that no leakage occurs at the joints. The stud bearingA is provided with holes 17 through which lubricating oil may freely pass. Disposed within the hollow stud bearings is a shaft 19 to the inner end of which the impeller 21 is secured. The impeller is disposed in the pump chamber 6 and rotation of the impeller causes the discharge of water through the outlet passage 4. At its inner end the said ybearing 16 is provided with an enlarged bore and arranged in this bore are a p1urality of liber washers 22 and a brass washer 20, for holding the fiber washers in place. The shaft 19 is of lesser diameter than. the interior of the stud bearing 16, forming an annular oil assage 18 surroundino' the shaft. The sha t is journalled at its inner end in the ber washers 22. Leakage of oil into the pump and the passage of waterinto the stud bearing is revented by the fiber washer 30 disposed 1n the cup washer 23 arranged on ther shaft 19. By enclosing the ber washer 30 in the cup washer, the ber washer is revented from spreading and is held in tiglit contact with the shaft 19. The stud bearing is rounded off at its inner edge and in assembly,the fiber washer 3() is worn in against the rounded edge so that it makes a tight joint. The shaft and stud bearing assembly are temporarily held to-l gether by t e leather pin 24 extending through the s aft.

Mounted on the stud bearing 16 are flanged bushings 25 which form a part of the regular equipment of the automobile. A felt washer 26 is interposed between the inner end of the bushings 25 and the shoulder on the stud bearing 16 to minimize the leakage of oil. The bushings serve to bush the pulley 27 which is the regular fan pulley with which the automobile is equipped and which is removed from its regular assembly and included in the present pump assembly. This regular Ford fan pulley 27 1s provided on its outer end with an axially extending iange 28 which forms a lubricant chamber- 29 surrounding the shaft 19. The pulley is provided with an aperture normally closed y the screw plug 31 whereby lubricant may be introduced into this chamber. This shaft 19 is formed on its outer end with a non-circular end, preferably rectangular, and the shaft is driven by means engaging this noncircular end 32. Secured to the pulley 27 by screws 33 which form part of the re ular Ford equipment, is a drive plate 34 which is provided -at its center with a. non-circular aperture into which the ends 32 of the shaft extend. The shaft 19 is thus supported and center portion and this fan 36 is also secured to the pulley by the screws 33. A gasket 37 is interposed between the fan and the drivwhich leaks pastthe non-circular end of the shaft 19 is retained by the central portion of the fan. The lubricant chamber is thus sealed a ainst leakage so that the lubricant is contalned therein for a long time, thus properly lubricating the part and reventing undue wear. It a pears to be di cult to persuade people to ubricate the wearing parts of their automobiles, particularlythe pumps, so that in the past great' dissatisfaction has been expressed in regard to circulating pumps, due to the fact that they wear out rapidly. By. enclosing the lubricant in a sealed chamber, the pum will operate properly for a long period o time even if additional lubricant is not introduced into the lubricant chamber.

The pulley and the shaft 19 are held in their relative proper positions by means of a coiledspring 41 interposed between the.

the pulley and holds the impel er and the pulley in .proper position.A The bushings 25, the pulley 27 and the fan 36 are standard Ford equipments and when it is desired to install the pump of this invention these parts are removed from the Ford and assembled with the other parts of the pump. The pump is of such structure that the axis of the pulley 27 lies in the same position with respect to the fan belt driving pulley, as it does in the regular Ford equipment.

The fan pulley is journalled on the stud bearing 16 and wear due to the rotation of the pulley, occurs at the surfaces of the stud bearing and the bore of the pulley. This wear causes the axis of the pulley to fall slightly with respect to the axis of the bushi ing, and consequently lowers the outer end of the shaft 19. The shaft 19 is full-floating and is journalled at its inner end only, so that as its outer end sags, it does not engagel the bore of the stud bushing and does not serve to journal the pulley, serving only as a drive shaft for the pump. The fiber washers 22 in which the inner end of the shaft is journalled readily conform to the angularity of the shaft, due to wear of the bushing and pulley, and keep the bearing tight` so that water will not leak therethrough into the lubricant chamber. The spring 41 holds the washer 23 to its seat, thus further preventing leakage.

I claim:

1. In a circulating pump, a casing, a hollow stud bearing secured to and extending from said casing, a. full-floating shaft extending through said stud'bearing and journalled therein at its inner end only, an impeller on one end of the shaft and disposed within the casing, a ulley journalled on said stud bearing an a plate secured to said ulley and engaging the other end of said s iaft.

2. In a circulatingpump, a casing, a hollow stud bearing secured to and extending from said casing, a shaft extending through said stud bearin an impeller on one end of the shaft and disposed within the casing, a packing1 interposed between the shaft and the stu bearing to prevent leakage from the casin into the stud bearing, a pulley journalle on said stud bearing, a spring operatively interposed between said shaft and pulley' to exert pressures thereon in the direction of the axis of the shaft to hold the packing in tight engagementwith the stud bearing and a plate secured to said pulley and engaging the other end of said shaft.I u1

3. n a circ ating ump, a casing, a hollow stud bearing secilired to and extending from said casing, a full-.fioating shaftextending through said stud bearing and journalled therem at its inner end only an impeller on' one end of the shaft an dis osed within the casing, a pulley journal ed'on said stud bearin, an axially extending flange on said pu ey spaced from `said shaft and forming a lubricant chamber within the pulley, and a plate formin a tight joint with said flange to close sai chamber and engaging the other end of said shaft.

4. In a circulating pump, a casing, a hollow stud bearing secured to 'and extendin from said casing, a shaft extending throug said stud bearin and out of bearing enagement therewith, a ackiig interposed etween the shaft and tllfe stu bearing, an

,wimpeller on one endk of the shaft and disposed within tlie casing, a ulley journalled on said stud bearing provi ed with a lubricant chamber surroundin said shaft, a spring disposed in said c amber and operatively interposed between the pulley and the shaft to exert pressures thereon in the direction of the axis of the shaft to hold the packing in tight engagement witlithe stud bearing and a plate engagin the other.

end of the shaft and closing sai lubricant chamber.

5. In afcirculating pump, a casing,l a hollow stud. bearing secured to said casing, a shaft of lesser diameter than the bore of the stud bearing extending through said bearing, an impeller on the inner end of said shaft, a flexible bearing member for the inner end of the shaft only, sothat the shaft floats in thestud bearing, a pulle journalled on the stud bearing anda drive p ate secured 6. In a circulating pump, a casing, a hol' low stud bearing secured to said casing, said stud bearingY having an enlarged bore at its inner end a shaft of lesser diameter than the bore of the stud bearing extending through said bearing, an impeller on the inner end of said shaft, packing disposed in said enlarged bore and forming the only journal for said shaft, so that the shaft floats in the stud bearing and driving means engaging the outer end of the shaft.

7. In a circulating pump, a casing, a hollow stud bearing secured to said casing, said stud bearing having an enlarged bore at its inner end a shaft of lesser diameter than the bore of Athe stud bearing extending through said bearing, an impeller on the inner end of the shaft, washers disposed in the enlarged bore and forming a flexible bearing for the inner end Lof the shaft, the shaft being otherwise unsupported by bearings, a packing ring surrounding the shaft and engaging the inner end of the stud bearing2 a backing plate for the packing ring, a spring arranged to exert a `longitudinal pressure on the shaft to hold said packing ring'a ainst the end of the stud earing and driving means engaging the outer end of the shaft.

8. In a circulating pump, a casing, a hollow stud bearing secured to and extending an enlarged bore at its inner end, a shaft extending through said stud bearing and out'of bearing engagement therewith, packing surrounding said shaft and disposed in said'enlarged bore and forming a bearing for one end of the shaft, an impeller on the inner end of said shaft, a pulley journalled on said stud bearing, said pulley being provided on one end with a lubricant chamber surrounding the shaft, a drive plate closing said chamber and engaging the other end of the shaft and a fan having an imperforate central portion secured to said pulley and overl ing said plate.

9. n a circulating pump, a casing, a hollow stud bearing secured to the casing, a

shaft of lesser diameter than the bore of the y KNUD FREITAG. 

